Optimal Weighting Method for Reducing Digital Satellite TV Differential Timing Error  

作　　者：WANG Shanhe HUA Yu XIANG Yu HUANG Changjiang GAO Yuanyuan ZHAO Xian 

机构地区：[1]National Time Service Center,Chinese Academy of Sciences,Xi'an 710600,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Journal of Electronics》2020年第2期322-326,共5页电子学报（英文版）

摘　　要：We illustrate the principle of Digital satellite TV differential timing(DSTVDT) and propose an optimal weighting method that reduces the timing error introduced by satellite ephemeris error. A mathematical formula for the timing error introduced by satellite ephemeris error is derived and analyzed. On the basis of the derived formula, the proposed optimal weighting method based on multi-base stations is presented. The results of data simulation and experiments show that when the proposed method is applied, for a satellite ephemeris error of 10 km, the ephemeris-introduced timing error is less than 10 ns, which is important for improving accuracy and stability of the timing system.We illustrate the principle of Digital satellite TV differential timing(DSTVDT) and propose an optimal weighting method that reduces the timing error introduced by satellite ephemeris error. A mathematical formula for the timing error introduced by satellite ephemeris error is derived and analyzed. On the basis of the derived formula, the proposed optimal weighting method based on multi-base stations is presented. The results of data simulation and experiments show that when the proposed method is applied, for a satellite ephemeris error of 10 km, the ephemeris-introduced timing error is less than 10 ns, which is important for improving accuracy and stability of the timing system.

关 键 词：Digital SATELLITE TV DIFFERENTIAL timing(DSTVDT) SATELLITE EPHEMERIS error TIMING accuracy OPTIMAL weighting method 

分 类 号：TN949.1[电子电信—信号与信息处理]